INTERFACE/INTERPHASE ENGINEERING OF POLYMERS FOR ADHESION ENHANCEMENT: PART II. THEORETICAL AND TECHNOLOGICAL ASPECTS OF SURFACE-ENGINEERED INTERPHASE-INTERFACE SYSTEMS FOR ADHESION ENHANCEMENT

Part I of this paper reviewed the theoretical principles of the macromolecular design of polymer interface/interphase systems for obtaining maximum adhesion and fracture performance of adhesively bonded assemblies. In Part II a novel, relatively simple and industry-feasible technology for surface-grafting connector molecules is demonstrated and discussed in detail and supported by a range of experimental examples. It is shown, in agreement with contemporary theory, that the use of chemically attached graft chemicals of controlled spatial geometry and chemical functionality enables a significant increase in the strength and fracture energy of the interphase, to the point of cohesive fracture of the substrate, or that of an adjacent medium such as adhesive, elastomer, or other material. This occurs even after prolonged exposure of investigated systems to adverse environments such as hot water.     

微波等离子体化学气相沉积的 a-Si∶H 性能研究

本文着重对微波等离子体化学气相沉积法高速沉积的 a-Si∶H 膜的物理性能进行评价研究.测量了沉积膜的光电性能、暗电导激活能、光禁带宽度、光吸收特性、沉积膜中悬键态密度以及氢含量等,并讨论沉积条件对膜性能的影响.结果表明,在沉积速率高达30～90(?)/s 情况下,膜的光电导(光照强度10~5Lux)与暗电导比值可达10~3～10~5,暗电导率从10~(-3)到10~(-11)((?)cm)~(-1),其激活能在0.23～0.88eV 之间(0～200℃温度范围内),光禁带宽度为1.40～2.20eV,氢含量约为2～20%.     

基于画圆算法的简单弧形贴图算法

本文提出了一种基于画圆算法的简单弧形贴图算法，并分析了该算法的可行性。     

RETARDATION AND REPAIR OF FATIGUE CRACKS BY ADHESIVE INFILTRATION

Abstract— This paper presents results which demonstrate that polymeric filler materials, such as low-viscosity epoxies, can be vacuum-infiltrated into fatigue cracks in 7050 aluminium alloy to produce significant levels of fatigue crack retardation. It was found that the main test variable affecting the degree of retardation was the stress level at which the adhesive was introduced and cured. Two infiltrated adhesives were tested.
Infiltration at 0% (of the original) peak fatigue stress level produced negligible retardation, while infiltration at the 80% stress level produced about 300% increase in fatigue life for one adhesive and 3000% for the other adhesive. For the highest infiltration stress level both crack-face wedging and adhesion contributed initially to the retardation, but the adhesive component ceased after a crack grew through the adhesive to the original crack tip position. The results are discussed in terms of the applicability of the technique to highly-stressed aircraft components.     

雾化液在空气-雾化钻井中的作用

在干空气钻井过程中出现地层产出液处理困难和井下不正常等现象时,常需将干空气钻井转交成空气-雾化钻井。雾化液是由表面活性剂、高分子量聚合物、井壁稳定剂等处理剂组成的。雾化液功能包括充分乳化地层产出液,促使并保持环空呈雾化稳态流,分离油永滴和钻屑团,增强空气流携屑、携水能力;抑制页岩水化并在井壁形成液膜,减小空气冲蚀作用,减小井壁摩阻。雾化液中表面活性剂的性能和浓度,及其它处理剂的水化溶解程度都会影响空气-雾化液性能。地层出液量监测对保障空气-雾化钻井顺利进行起着十分重要的指导作用。     

低温促凝剂CN-2的研究与应用

针对低温条件下，水泥浆因候凝时间长，极易造成油、气、水侵，导致固井后水泥环不致密，固井质量差这一现象，研制了一种新型低温复合早强促凝剂CN—2，并完善了与之配套的水泥浆体系，从而满足各类低温条件下的固井施工，为低温浅层油气井固井质量的提高提供了可靠的保证。     

浅谈ILLUSTRATOR教学中“外观面板”的用法

在Illustrator教学中,"外观面板"的作用是非常重要的,但在大多数教材中涉及实例及用法太少."外观面板"在对象的样式控制方面有着神奇的功能,"外观面板"中的每一项都是活动的,这意味着你可以随时更改它们。掌握好"外观面板"的使用,可以高效高质量的完成设计任务。     

稀土对ZA27合金阻尼性能的影响

研究了稀土对ZA27合金阻尼性能的影响规律。结果表明：稀土变质可提高ZA27合金的阻尼性能，经稀土变质后的试样，其内耗是未变质的试样的1．4倍。ZA27合金为发挥其阻尼作用，在频率高于70Hz时，效果明显，且经稀土变质后的试样强迫振动衰减效果比未变质的试样强。     

冷却介质对ZG30CrMn2Si2NiMo组织和力学性能的影响

研究了不同冷却介质对ZG30CrMn2Si2NiMo铸钢力学性能及组织的影响.试验结果表明,奥氏体化后空冷ZG30CrMn2Si2NiMo组织为板条贝氏体型铁素体和残余奥氏体组织,奥氏体化后淬火ZG30CrMn2Si2NiMo组织为板条马氏体、贝氏体型铁素体和残余奥氏体组织.ZG30CrMn2Si2NiMo获得板条马氏体、贝氏体型铁素体和残余奥氏体组织时,具有良好的力学性能.     

非调质钢的合金设计与热加工工艺及性能

论述了非调质钢的性能特点，分析了V、Nb、Ti、Mn、Cr、Si等常用合金元素对非调质钢组织和力学性能的影响，并对热加工工艺、热处理等因素个性能的影响作了分析和讨论。